Building Permits in Hawaii

We cover 14 cities in Hawaii. Select a city below to see local permit requirements.

14 Cities Covered

1,406 Permit Rules

IRC Building Code Base

Building Codes in Hawaii

Building permit requirements in Hawaii are enforced at the local level, each city and county building department sets its own rules, fees, and timelines. Most cities in Hawaii follow the 2018 IRC, though 1 city is still on the 2018 IRC + Hawaii State Building Code amendments + Hawai'i County Code Chapter 5B amendments edition.

We cover 14 cities in Hawaii with 1,406 specific permit rules. That's real, locally researched data, not generic advice. Each city page shows exactly what triggers a permit, what's exempt, estimated fees, and how to apply.

The bottom line: don't assume your city follows the same rules as the one next door. A fence that's exempt in one town might need a full permit two miles away. Always check your specific city.

Permit Fees Across Hawaii

Across the 14 cities we cover in Hawaii, permit fees range from $25 – $7,500. The average sits around $178 – $731.

Fees vary a lot by city and project type. A simple fence permit might run you $50, while a full room addition could be $2,000+. Most cities calculate fees based on your estimated project value, typically 1–2% of construction cost. Check the specific city page for accurate numbers.

Common Permit Exemptions in Hawaii

These are the most common projects that don't require a permit across cities in Hawaii. Keep in mind, "exempt from a permit" doesn't mean "exempt from code." You still have to build to code even without a permit.

Fence: Exempt in 27 of our 14 covered cities

Windows and Doors: Exempt in 23 of our 14 covered cities

Tree Removal: Exempt in 14 of our 14 covered cities

Shed: Exempt in 14 of our 14 covered cities

Patio: Exempt in 14 of our 14 covered cities

Exemptions vary by city. Always verify with your local building department before starting work.